[1] Heidelberg Univ, Agaples Bethanien Hosp Heidelberg, Geriatr Ctr, Heidelberg, Germany
[2] Friedrich Alexander Univ Erlangen Nurnberg, Inst Biomed Aging, Erlangen, Germany
[3] Robert Bosch Krankenhaus, Dept Clin Gerontol & Geriatr Rehabil, Auerbachstr 110, D-70376 Stuttgart, Germany
[4] Ulm Univ, Inst Epidemiol & Med Biometry, Ulm, Germany
[5] Mannheim Univ Appl Sci, Dept Social Work, Mannheim, Germany